Elektra II Runs Unbelievably Well!!

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Jim Berquist
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elektra II

Post by Jim Berquist » Mon Jun 11, 2007 9:43 pm

Good Stuff. What type of injector did you use? Open, Rossco type?

I attempted to run the 20lb chines today. Hodgedup a Rossco injector. Then the damn wind starts blowing like from 40 mph to like 50. Then it starts raining. It's a conspiracy I tell you.
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Jim Berquist
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jet boat

Post by Jim Berquist » Tue Jun 12, 2007 6:19 pm

Check this one out Mark42.

I don't know what the engine was Hiller type twin exhost?

http://www.youtube.com/watch?v=wPiEam_cfWo


Jim
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Mark 42
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Post by Mark 42 » Tue Jun 12, 2007 6:35 pm

The simplicity of the hull geometry would make it easy to build.
Hmm....

larry cottrill
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A Comment

Post by larry cottrill » Thu Jun 14, 2007 12:22 pm

Mark 42 wrote:Engine warmed up & running without ignition spark. The exhaust must run pretty clean because not even a flame is visible.
Mark -

I don't think you're really running hard yet. It's true that you don't observe much tail flame on the Elektra engines because of the very long pipe; however, you should definitely be seeing something coming out of the intake. I wonder if your fueling setup isn't just too restrictive at some point before it gets to the spout. If so, you could be getting a lot more power.

Were you able to run it up to rich extinction, where it roughens up and then flames out? If you can't open it up that far, you probably aren't really getting close to the maximum thrust point. The Elektras I built always had lots of intake flame, no matter how I set up the spouting point. Of course, it was only really visible in low ambient light situations, but that looks like what you have in the pictures (a fully shaded area).

You might try a lemniscate spout on the end of a piece of 3/16-inch OD brake line, with a slightly larger hose than you're using now to match. Of course, that won't help if there's a point of restriction upstream at the valve or something.

L Cottrill

Mark 42
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Post by Mark 42 » Thu Jun 14, 2007 3:45 pm

I'll eventually try it with a larger fuel line.

I got some braided stainless hose with 1/4 compression
fittings for an ice maker (10 ft for $8 at Ace or True Value)
and a 6 foot length of SS brake line (as you suggest).

I have a sailboat that needs me first, but during the week I might
squeeze in some work on the engine.

I suspect the safety valve on the propane tank may be the issue,
if it has one that is kicking in. I do have two other tanks.

I might use the 10 pound tank with the tether to the engine
and a handle and my skateboard.

That should make a humorous video!

But, no, I better stop myself for now!

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Elektra II

Post by Jim Berquist » Thu Jun 14, 2007 4:56 pm

Mark42: If you Start a few weeks ago you may get there in time!



http://www.pulse-jets.com/phpbb2/viewtopic.php?t=4335

Jim
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larry cottrill
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If They Run At All, Old Designs Never Die

Post by larry cottrill » Fri Jun 15, 2007 3:14 pm

I keep wanting to say that I find renewed interest in Elektra engines both gratifying and amusing. When I first did the Elektras (summer 2004), most of the generous enthusiasm was due to the fact that I had finally designed something that would actually run! Other than Steve Bukowsky (who wanted something unusual to do as an out-of-school summertime project), just about NOBODY was interested in building these. In the four years since then, about two or three people worldwide (before this thread) cared enough to want to try building one.

I put up this incredibly inept video of the first good run of the Elektra I on YouTube the first week in February this year - check out how many views this has had in the last five months:
http://www.youtube.com/watch?v=Wz00R2sGqpk

Of course, it may be the comical ineptness that gives the film its popularity ;-) Some people will do anything to make some noise in the world - ha!

L Cottrill

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